Internet connection issues aren't definite proof that someone is trying to attack North Korea. The country's internet is only accessed by a handful of people, so it doesn't take much to force it offline. Officially North Korea only has 1,024 IP addresses.

But the problem could be due to someone launching a cyberattack on the country.

"It would not take much to shut down such access since they are not privy to diverse and redundant Internet routes," Jeff Bardin, Chief Intelligence Officer of internet security company Treadstone 71 told Business Insider in an email. "This would be a fairly easy action by a nation state to bring NK's internet activity to a halt."

Doug Madory, director of Internet analysis at Dyn Research, said: "I haven't seen such a steady beat of routing instability and outages in KP before. Usually there are isolated blips, not continuous connectivity problems. I wouldn't be surprised if they are absorbing some sort of attack presently." He went on to say that "They have left the global Internet and they are gone until they come back."

A Distributed Denial of Service attack (DDoS) works by flooding part of the internet with more web traffic than it can handle. If it receives too much traffic, then it buckles and goes offline.

Another expert, Matthew Prince, CEO of CDN CloudFlare, described North Korea's internet access as "toast," remarking that "the North Korean network has gone away."

Reuters, citing current and former U.S. law enforcement and security officials, notes that "only a tiny number of people in North Korea's leadership have access to the Internet, and that almost all its Internet links and traffic pass through China."